The drop in productivity reflected a 1.0-percent rise in output and a 2.2-percent increase in hours of all persons. In the fourth quarter of 2000, nonfarm business productivity grew 2.0 percent, as output rose 0.8 percent and hours decreased 1.3 percent.

Output per hour in the nonfarm business sector was originally reported as declining at an annual rate of 0.1 percent in the first quarter of 2001. The revision largely reflects a smaller estimate of output and, to a lesser degree, a higher estimate for hours.